Measurements of (p, rho, T) for {xCH(3)OH + (1 - x)H2O} at x = (1.0000, 0.8005, 0.4002, and 0.2034) and at specified temperatures and pressures in the compressed liquid phase were carried out with a metal-bellows variable volumometer from T = 320 K to T = 420 K for x = 1.0000 and to T = 400 K for x = (0. 8005, 0.4002, and 0. 2034) at pressures from the bubble pressure to p = 200 MPa. The results cover the high-density region from rho = 652 kg . m(-3) for x = 1.0000 to rho = 1008 kg . m(-3) for x = 0.2034. The experimental uncertainties at a 95 per cent confidence level in temperature T, pressure p, density rho, and mole fraction x were estimated to be less than +/-5 mK, +/-1.0 . 10(-3). rho, +/-2.0 . 10(-3) . rho, and +/-1.0 . 10(-3) . x, respectively. Measurements of vapour pressure, bubble pressure, and saturated liquid density are also reported. On the basis of the present results, the excess molar volumes V-m(E) of the mixtures were calculated and are illustrated as a function of temperature and pressure. (C) 2003 Elsevier Science Ltd. All rights reserved.